A Lubricating Oil Valve Controlled by Extrinsic Gas

Abstract

The present application provides a lubricating oil valve controlled by external air, which includes: a valve housing with a housing chamber, a lubricating oil inlet at its side, and a lubricating oil outlet at its lower end, the lubricating oil outlet communicates with the lubricating oil inlet, wherein The upper part has a stepped part, and an outer culvert air inlet connected to the receiving chamber is arranged on the stepped part; a T-shaped spool is arranged in the receiving chamber, and the T-shaped spool can adjust the lubricating oil between the lubricating oil inlet and the lubricating oil outlet. Flow rate, the outer side of which is provided with a sealing groove, the sealing groove is provided with an expansion ring, and the T-shaped valve core is provided with a spring outer guide sleeve, wherein a sealing ring is provided between the end of the T-shaped valve core and the valve housing; The blocking cover fixedly connected with the valve housing is provided with a through hole communicating with the atmospheric environment, and the blocking cover is provided with a spring inner guide; the spring is arranged between the T-shaped valve core and the blocking cover. By constructing the steady-state control model of the oil valve in the low state and the steady-state control model in the high state, the opening and closing of the oil valve under the control of the trapped air is realized.

Description

technical field [0001] The application belongs to the technical field of aero-engines, and in particular relates to a lubricating oil valve controlled by an external gas. Background technique [0002] The main bearing cavity of advanced aero-engines adopts the method of full-envelope extrinsic gas sealing, and the lubricating oil supply system adopts a constant pressure difference oil supply scheme above the idle state. Near the left boundary of the flight envelope, the aero-engine is at idle. Or throttling state, the main bearing cavity sealing pressure difference is very small, which makes the bearing cavity have the risk of oil leakage at the sealing place, which leads to the increase of oil system consumption and affects the cruising ability, and the oil leaks to the main flow of the engine. The resulting oil coking or even fire and other failures. [0003] At present, advanced aero-engines mostly adopt the one-way valve structure with throttling to realize the scheme o...

AI Technical Summary

Problems solved by technology

[0005] 1) The one-way valve with throttle cannot be matched with the aerodynamic state of the high-altitude engine. In order to ensure the reliability of the mechanical system, it is only used to reduce the oil supply when the engine is starting, and it cannot meet the requirements of engine starting to ground idle, high-altitude air idle, Design requirements for most working conditions such as throttling at high altitude and in the air;

Images